单项选择题 What is the MINIMUM Windows Experience Index recommended for using Aero enhancements in Windows 7?（）

单项选择题 A technician installs an additional hard drive controller. Which of the following processes will MOST likely prevent errors? （）

单项选择题 A technician has had several support requests for one PC. The technician has reseated the PCIcards and replaced the hard drive in the PC located in a school cafeteria kitchen. PCs located in the business office or the classrooms have not had this issue. Which of the following is MOST likely causing this PC’s issue?（）